Improvement in metallic roofing



'Patented June 28,1870.'

| Tins cd. P

,J. B. DAVIS.` I METALLIC Roo'FING.

UNITED STATES PATENT CEEICE.v

'JOHN Boon DAVIS, or CLEVELAND, oHIo'.

IMPROVEMENT IN METALLIC ROOFING".`

`Specification formingr part of Letters Patent No. l04,7 l 3, dated June 2S, i870.

Drawing.

Figure 1 is aview of the roof with the sheets attached thereto. Fig. 2 is a side View of a sheet of rooting; Fig. 3, a view of the opposite s ide of Fig.V 2; Figs. 4 and 5, detached sections.

Like letters of reference refer to like parts in the different views. Y

Objective.

This invention relates to the attachment of sheets of metal to the roof-boards of buildings bymeans of clamps of metal, whereby they are attached to the boards and by means of laps turned upon the ends and sides of the sheets, whereby they are locked to each other, as hereinafter more fully described.

Descriptive.

` In Fig. 1, A represents the roof'boards, to fwhch the sheets 1B are attached. It will be observed that the ends of each sheet -areturn ed upward and, over upon itself', forming a narrowlap, C, Fig. 2on each side, and a similar ,i lap, D, Fig. 3, upon the other; each of the "laps isalso indicated by the dotted lilies c. *The sidesof lthe sheets are also turned in like j manner, forming a lap, E, Fig. 2on one side,g

,j "and al'ap, F,Fig. 3, upon the other, and which """indicated by the dotted lines b. An

w-offsaid lapsis-shown at'G, Fig. 3.

\ .y p tsofimetal thus prepared with overlapnpr gedgesiarelaid upon the roof as follows: A strip orfmetal, H, Fig. l, is first nailed along he edge of thereof, so that it shall project ighltlyi,therefrom. Now, atl the lower leftvhand corner, is laid `the first sheet I, in such that the .under Vlap Dshall embrace the cting ed'ge'ofthe strip H, which will holdV the lowerend of ,the sheet close and securely tolitheroof-boards. `j A second sheet, J, is now 12ml, tliejfunderlap pf the end embracing the strip H and the underlap F of the side locking into the upper lap E of the side, as shown in Fig. l.

By this it will be seen that each successive sheet laid overlaps the preceding one, and is locked thereto by the upper lap of the preceding'sheet and the underlap of the succeeding one, thereby forming-a single lock-seam joint of easy construction, durable, and close. The

upper end Vof the sheets is fastened'to the roof by a clamp of metal, K, Fig. 1.v The end ot' said clamp is bent, so as'to lock 'into the lap C of the sheet, whereas the opposite end is nailed to the roof-boards, as shown in the drawing.

By this means the upper end of the several sheets is simply and securely fastened vto the boards, and which also serve to hold thelower I Y end of a second course of sheets, which are laid as follows: Beginning at the lefthand, as before, the uuderlap D of the endis locked into the upper lap C, as shown in Fig. 1-L being the iirst sheet in the second course; a second sheet is now laid, by locking the ends and sides in the manner as above described,

and so on through the entire number of courses I necessary to cover the building.

It will be observed that the sides of the sheets are secured -to the ends of the roof by a'strip of metal, M, in like manner as on the ends along the eaves of the roof. At the corners of the sheets, where leakage is most liable to arise, owing to its weak point of construction and way of forming the joint in the ordinary is avoided with'iny mode of making-these corners double-lapping in placeof sealniug atl the angle, as is usually done. From each 'corner of the plate I cut out a piece, as seen at c, Fig. 4, forming a right-angle notch 5i then a flange or lap is formed by bending the section d of the vplate along the line d until the edge d laps onto the line d; .then the section e ofthe plate is folded in the same way, which makes a strong joint at the corners e', Where there is,

by this means, a double thickness of plates, which gives increased strength to the roof, and security against iniltration or leakage. In the ordinary way, as shown in Fig. 5, a piece is cnt from each corner of tbe plate noted at f, to the line f,which leaves the corner exposed, as the section g of the plate is poled down along the line g', to form a lap indicated 'of this slit; in this cese the laps do not fold 'are not only protected from observation and by the lines h lr; hence, there is e slit or seam at the line It', where the two la-ps meet together, and an opening at the extreme point liability to be torn up, but also secluded from the weather, making the attachment of a strong and durable character.

Claim.

What I claim as my improvement, :inddesire to secure by Letters Patent, is-

rl he arrangement of the metallic roofing of plate, having side laps E F, reversely to each other, laps U D, also in reverse, with thedouble-lnpped corners at e', in combination with the hooked clamp K, as substantially set forth.

JOHN BOON DAVIS. Witnesses:

J. H. .BURR-men,

D. B. HUMPHERY. 

